CN103212602A - Mechanical expanding technology of double-layer metal composite welded pipe - Google Patents
Mechanical expanding technology of double-layer metal composite welded pipe Download PDFInfo
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- CN103212602A CN103212602A CN201210015561XA CN201210015561A CN103212602A CN 103212602 A CN103212602 A CN 103212602A CN 201210015561X A CN201210015561X A CN 201210015561XA CN 201210015561 A CN201210015561 A CN 201210015561A CN 103212602 A CN103212602 A CN 103212602A
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Abstract
The invention discloses a mechanical expanding technology of a double-layer metal composite welded pipe and belongs to the field of pipe manufacture and processing. The mechanical expanding technology comprises the following steps of carrying out outer welded pipe expanding, carrying out outer welded pipe rounding, carrying out outer welded pipe straightening, removing an inner welding line of an outer welded pipe, carrying out inner welded pipe expanding, carrying out inner welded pipe rounding, carrying out inner welded pipe straightening, removing an outer welding line of an inner welded pipe, sleeving the outer welded pipe on the inner welded pipe, carrying out flanging of the inner welded pipe, carrying out expanding in a mechanical expanding device, and unloading pressure so that the outer welded pipe produces springback and firmly fastens the inner welded pipe and the double-layer metal composite welded pipe is formed. The mechanical expanding technology realizes effective production of the novel double-layer metal composite welded pipe, and tight fitting of the inner and outer metal welded pipes. The mechanical expanding technology has a reasonable design, good effects and high size precision and realizes tight fitting of the inner and outer metal welded pipes.
Description
Technical field
The compound welded tube machinery of double-level-metal of the present invention expanding technology belongs to pipeline manufacturing and manufacture field, is mainly used in the production of bimetal pipe.
Background technology
The compound welded tube of double-level-metal is a kind of novel high technology content pipeline, the mode of production that adopts two-layer welded tube to nest together, the general employing of two-layer welded tube has two kinds of different metal material manufacturings to form, inner tube adopts stainless steel or other wear-resistant material, very strong anticorrosive oxidation resistance is arranged, but cost an arm and a leg, the outer layer metal welded tube adopts common pipe line steel material, can provide good plasticity and shock resistance, good mechanical performance, price economy.Double layer of metal fits tightly together each other, form composite bimetal pipe, can effectively solve the technical barrier of energy high strength welded tube corrosion resistance difference, save production cost, satisfy continual extensive mode of movements such as oil, natural gas, reduce coefficient of friction, reduce the transporting resistance of material, and be convenient to processing, installation and the maintenance of pipeline.
Traditional individual layer welded tube is hole enlargement, full circle, alignment.Double-deck welded tube is after outer welded tube and internal layer welded tube are carried out hole enlargement, full circle, alignment respectively, the internal layer welded tube is inserted in the outer welded tube, because the amount of plastic deformation of outer welded tube and internal layer welded tube and springback capacity is different, inaccessible dimension precision requirement, the purpose that inaccessible inner and outer pipes fits tightly.
The hole enlargement and the main difference of conventional monolayers pipe hole enlargement of double-deck welded tube have 2 points: the one, certain clearance is arranged between the inner and outer pipes, thereby its enlarging rate difference, the deflection of pipe and outer tube in must taking into account simultaneously when determining the hole enlargement parameter, should reach dimension precision requirement, reach the purpose that inner and outer pipes fits tightly again; The 2nd, the bimetallic tube wall thickness needs bigger enlarging rate.
Summary of the invention
The object of the present invention is to provide the hydraulic pressure expanding technology of the compound welded tube of double-level-metal, produce the compound welded tube of satisfactory double-level-metal.
The technical solution adopted for the present invention to solve the technical problems is:
Outer welded tube hole enlargement, outer welded tube full circle, outer welded tube alignment, remove the inside weld of outer welded tube, the hole enlargement of internal layer welded tube, internal layer welded tube full circle, the alignment of internal layer welded tube, the outside weld of removing internal layer welded tube is inserted in the internal layer welded tube in the outer welded tube, the internal layer welded tube is carried out the flange operation, send into the machinery expanding machine and carry out hole enlargement, shed pressure after, outer welded tube generation resilience, with the firmly fastening of internal layer welded tube, form the compound welded tube of bimetallic.At first to outer welded tube and the independent hole enlargement respectively of internal layer welded tube, eliminate the moulding stress and the welding stress of welded tube, the caliber of welded tube is expanded to the accuracy rating of dimensional requirement, carry out full circle and alignment again, its effect is to guarantee the circularity of ectonexine welded tube and straight degree, guarantee the gap error between two pipes, make things convenient for inner tube to put into outer tube.Then the mating surface of outer welded tube and internal layer welded tube is handled, outer welded tube through being up to the standards and internal layer welded tube are implemented the encapsulation operation, the internal layer welded tube is inserted in the outer welded tube, the internal layer welded tube is carried out the flange operation can enter the internal layer welded tube smoothly so that expanding machine expands head, send into the machinery expanding machine by conveying roller and carry out hole enlargement, allow two root bead pipes firmly fit together.Because the amount of plastic deformation of outer welded tube and internal layer welded tube and springback capacity is different, the springback capacity of outer welded tube is greater than the springback capacity of internal layer welded tube, after shedding pressure, outer welded tube generation resilience, with the firmly fastening of internal layer welded tube, two-layer like this welded tube just can fit tightly together, forms the compound welded tube of bimetallic.
The present invention processes internal layer welded tube and outer welded tube separately at first respectively, outer welded tube hole enlargement, outer welded tube full circle, outer welded tube alignment, remove the inside weld of outer welded tube, the hole enlargement of internal layer welded tube, internal layer welded tube full circle, the alignment of internal layer welded tube, remove the outside weld of internal layer welded tube, to the internal layer welded tube, outer welded tube carries out ultrasonic examination and X-ray procedure, to the internal layer welded tube, the mating surface of outer welded tube is handled, through be up to the standards and surface treatment after, to the internal layer welded tube, outer welded tube is implemented the encapsulation operation, the internal layer welded tube is inserted in the outer welded tube, two ends grow each 50 ~ 100mm of outer welded tube, with the internal layer welded tube, in removing in the two ends 150mm scope of outer welded tube, the outside weld reinforcement is used the high pressure water washing steel duct, with flanger certain angle is dug at the two ends of internal layer welded tube, can be made things convenient for expanding machine to expand entering of head like this.Send into the machinery expanding machine by conveying roller and carry out hole enlargement, the compound welded tube of the double-level-metal behind the machinery expanding is carried out the bilayer check, repair end, carry out ultrasonic examination and X-ray procedure again, pipe end magnetic powder test, appearance test, stock.
The present invention can finish effective manufacturing of novel double-layer metal composite welded tube, finishes fitting tightly of inside and outside double layer of metal welded tube.The present invention is reasonable in design, and is respond well, dimensional accuracy height, the purpose that inaccessible inner and outer pipes fits tightly.
Description of drawings
Accompanying drawing 1 is the composite bimetal pipe cutaway view.
Accompanying drawing 2 is bimetallic tube expanding technology flow charts.
Accompanying drawing 3 is that the machinery expanding machine is to bimetallic tube hole enlargement structural representation.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing.
Among the figure: internal layer welded tube 1, outer welded tube 2, oil cylinder piston 3, push rod 4, expand 5, piece 6, guide post 7, sleeve 8 expand.
As shown in Figure 1, the double-level-metal multiple tube is to be closely cooperated mutually by internal layer welded tube 1 and outer welded tube 2 to form, general internal layer welded tube is made by stainless steel or other noncorroding metal material, and outer welded tube is mainly good by plasticity, intensity is high, and the pipe line steel material of good mechanical performance is made.
As shown in Figure 2, the compound welded tube machinery of double-level-metal of the present invention expanding technology is as follows, separately internal layer welded tube and outer welded tube are processed at first respectively, outer welded tube hole enlargement, outer welded tube full circle, the inside weld of outer welded tube, the hole enlargement of internal layer welded tube are removed in outer welded tube alignment, internal layer welded tube full circle, the alignment of internal layer welded tube, the outside weld of removing internal layer welded tube, the moulding stress and the welding stress of elimination welded tube, the caliber of internal layer welded tube and outer welded tube is expanded to the accuracy rating of dimensional requirement, carrying out full circle and alignment is circularity and the straight degree that guarantees the ectonexine welded tube, guarantees the gap error between two pipes, makes things convenient for inner tube to put into outer tube.Internal layer welded tube, outer welded tube are carried out ultrasonic examination and X-ray procedure, mating surface to internal layer welded tube, outer welded tube is handled, mainly comprise cleaning dirt, rust cleaning, degreasing and texturing, surface treatment adopts special-purpose machinery to finish, and outer welded tube is once removed the dirt and the oxide of inner surface with ball blasting method; The internal layer welded tube adopts wire brush with surface texturing.Through be up to the standards and surface treatment after, to the internal layer welded tube, outer welded tube is implemented the encapsulation operation, the internal layer welded tube is inserted in the outer welded tube, two ends grow each 50 ~ 100mm of outer welded tube, with the internal layer welded tube, in removing in the two ends 150mm scope of outer welded tube, the outside weld reinforcement, use the high pressure water washing steel duct, with flanger certain angle is dug at the two ends of internal layer welded tube, can make things convenient for expanding machine to expand entering of head like this, send into the machinery expanding machine by conveying roller and carry out hole enlargement, allow two root bead pipes firmly fit together, the compound welded tube of the double-level-metal behind the machinery expanding is carried out the bilayer check, repair end, carry out ultrasonic examination and X-ray procedure again, the pipe end magnetic powder test, appearance test, stock.
As shown in Figure 3, the machinery expanding device comprises by oil cylinder piston 3, push rod 4, expand 5, piece 6 expands, guide post 7, sleeve 8 is formed, start oil cylinder piston 3, promoting two push rods 4 travels forward, a 5 axial move toward one another is expanded in push rod extruding two, the bloated piece 6 that contacts with expansion 5 inclined-plane begins to do radial motion, outer welded tube 2, internal layer welded tube 1 inwall is propped up by bloated piece 6, plastic deformation takes place, keep this pressure a period of time, shed pressure then, outer welded tube and internal layer welded tube generation resilience, the springback capacity of outer welded tube is greater than the springback capacity of internal layer welded tube, thereby fastening internal layer welded tube, two-layer welded tube firmly fits together, mobile welded tube not the part of hole enlargement to machinery expanding machine operating position, repeat aforesaid operations repeatedly, finish the hole enlargement production of whole welded tube.
Claims (2)
1. the compound welded tube hydraulic pressure of double-level-metal expanding technology, outer welded tube hole enlargement, outer welded tube full circle, outer welded tube alignment, remove the inside weld of outer welded tube, the hole enlargement of internal layer welded tube, internal layer welded tube full circle, the alignment of internal layer welded tube, remove the outside weld of internal layer welded tube, it is characterized in that the internal layer welded tube is inserted in the outer welded tube, the internal layer welded tube is carried out the flange operation, send into the machinery expanding machine and carry out hole enlargement, after shedding pressure, outer welded tube generation resilience with the firmly fastening of internal layer welded tube, forms the compound welded tube of bimetallic.
2. the compound welded tube hydraulic pressure of double-level-metal according to claim 1 expanding technology, it is characterized in that separately internal layer welded tube and outer welded tube being processed respectively, outer welded tube hole enlargement, outer welded tube full circle, outer welded tube alignment, remove the inside weld of outer welded tube, the hole enlargement of internal layer welded tube, internal layer welded tube full circle, the alignment of internal layer welded tube, remove the outside weld of internal layer welded tube, to the internal layer welded tube, outer welded tube carries out ultrasonic examination and X-ray procedure, to the internal layer welded tube, the mating surface of outer welded tube is handled, through be up to the standards and surface treatment after, to the internal layer welded tube, outer welded tube is implemented the encapsulation operation, the internal layer welded tube is inserted in the outer welded tube, two ends grow each 50 ~ 100mm of outer welded tube, with the internal layer welded tube, in removing in the two ends 150mm scope of outer welded tube, the outside weld reinforcement is used the high pressure water washing steel duct, with flanger certain angle is dug at the two ends of internal layer welded tube, send into the machinery expanding machine by conveying roller and carry out hole enlargement, the compound welded tube of the double-level-metal behind the machinery expanding is carried out the bilayer check, repair end, carry out ultrasonic examination and X-ray procedure again, the pipe end magnetic powder test, appearance test, stock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210015561XA CN103212602A (en) | 2012-01-18 | 2012-01-18 | Mechanical expanding technology of double-layer metal composite welded pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210015561XA CN103212602A (en) | 2012-01-18 | 2012-01-18 | Mechanical expanding technology of double-layer metal composite welded pipe |
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| CN103212602A true CN103212602A (en) | 2013-07-24 |
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| CN201210015561XA Pending CN103212602A (en) | 2012-01-18 | 2012-01-18 | Mechanical expanding technology of double-layer metal composite welded pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105817780A (en) * | 2016-04-21 | 2016-08-03 | 西安向阳航天材料股份有限公司 | Method for controlling dimensions in surfacing for pipe end of bimetal composite pipe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62187509A (en) * | 1986-02-13 | 1987-08-15 | Nippon Steel Corp | Production of seamless composite steel pipe |
| JPH04175138A (en) * | 1990-11-09 | 1992-06-23 | Sekisui Chem Co Ltd | Manufacture of spiral composite pipe |
| CN1463810A (en) * | 2002-06-25 | 2003-12-31 | 范建华 | Multiple tube inner tube rolling expansion synthesized apparatus and products thereof |
| CN1806958A (en) * | 2005-12-31 | 2006-07-26 | 浙江工业大学 | Composite device and method for preparation of bimetal composite tube |
| CN1822907A (en) * | 2003-05-20 | 2006-08-23 | 克拉德泰克国际有限公司 | Production of clad pipes |
| CN101234406A (en) * | 2007-02-01 | 2008-08-06 | 偃师市安力电力设备有限公司 | Method for manufacturing multiunit tube |
-
2012
- 2012-01-18 CN CN201210015561XA patent/CN103212602A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62187509A (en) * | 1986-02-13 | 1987-08-15 | Nippon Steel Corp | Production of seamless composite steel pipe |
| JPH04175138A (en) * | 1990-11-09 | 1992-06-23 | Sekisui Chem Co Ltd | Manufacture of spiral composite pipe |
| CN1463810A (en) * | 2002-06-25 | 2003-12-31 | 范建华 | Multiple tube inner tube rolling expansion synthesized apparatus and products thereof |
| CN1822907A (en) * | 2003-05-20 | 2006-08-23 | 克拉德泰克国际有限公司 | Production of clad pipes |
| CN1806958A (en) * | 2005-12-31 | 2006-07-26 | 浙江工业大学 | Composite device and method for preparation of bimetal composite tube |
| CN101234406A (en) * | 2007-02-01 | 2008-08-06 | 偃师市安力电力设备有限公司 | Method for manufacturing multiunit tube |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105817780A (en) * | 2016-04-21 | 2016-08-03 | 西安向阳航天材料股份有限公司 | Method for controlling dimensions in surfacing for pipe end of bimetal composite pipe |
| CN105817780B (en) * | 2016-04-21 | 2018-06-05 | 西安向阳航天材料股份有限公司 | A kind of method for controlling composite bimetal pipe pipe end built-up welding size |
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Application publication date: 20130724 |